The typical reaction time for most drivers is considered to be about 1.50s. Traffic safety engineers often use a deceleration value of 5.85m/s2to calculate the minimum stopping distance for a vehicle on smooth, dry pavement. Determine the distance travelled while reacting, the distance travelled while braking, and the minimum stopping distance of a vehicle travelling 110km/h
110km/hr * 1000m/km * 1hr/3600s = 30.55 m/s
s = 30.55t - 5.85/2 t^2
so plug in t=1.5